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LM3697YFQR Fiches technique(PDF) 1 Page - Texas Instruments

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No de pièce LM3697YFQR
Description  High-Efficiency Three-String White LED Driver
Download  36 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

LM3697YFQR Fiches technique(HTML) 1 Page - Texas Instruments

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IN
SW
HVLED1
PGND
HWEN
SDA
SCL
COUT
CIN
L
D1
PWM
OVP
VIN = 2.7V to 5.5V
VOUT up to 40V
VIN
HVLED3
HVLED2
LM3697
www.ti.com
SNOSCS2A – NOVEMBER 2013 – REVISED DECEMBER 2013
High-Efficiency Three-String White LED Driver
Check for Samples: LM3697
1
FEATURES
DESCRIPTION
The LM3697 is a high-efficiency three string power
Drives Three Parallel High-Voltage LED Strings
source for backlight or keypad LEDs in smart-phone
for Display and Keypad Lighting
handsets. The high-voltage inductive boost converter
High-Voltage Strings Capable of up to 40V
provides the power for three series LED strings for
Output Voltage and up to 90% Efficiency
display backlight and keypad functions (HVLED1,
HVLED2 and HVLED3).
Up to 30 mA per Current Sink
11-Bit Configurable Dimming Resolution
An additional feature is a Pulse Width Modulation
(PWM) control input for content adjustable backlight
PWM Input for Content Adjustable Brightness
control, which can be used to control any high-
Control (CABC)
voltage current sink.
Fully Configurable LED Grouping and Control
The
LM3697
is
fully
configurable
via
an
I2C-
Four Configurable Over-Voltage Protection
compatible interface. The device is available in a 12-
Thresholds (16V, 24V, 32V, and 40V)
bump (1.26 mm ± 30 µm x 1.61 mm ± 30 µm x 0.6
Selectable 500 kHz and 1MHz Switching
mm ± 75 um) DSBGA and operates over a 2.7V to
Frequency
5.5V input voltage range and a
−40°C to +85°C
temperature range.
30 mm2 Total Solution Size
APPLICATIONS
Power Source for Smart Phone Illumination
Display, Keypad and Indicator Illumination
Typical Application Circuit
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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